Dalaivala wapambali ndi chida chauinjiniya chomwe chimagwiritsidwa ntchito kuponya milu, kaya yamatabwa kapena chitsulo, pansi. Chodziwika chake ndi kukhalapo kwa njira yolumikizira mbali yomwe imalola kuyendetsa kuchokera mbali imodzi ya mulu popanda kufunikira kuti makina asunthe. Dongosololi limathandiza woyendetsa miluyo kuti azigwira ntchito bwino m'malo otsekeredwa ndipo ndi oyenera makamaka pamikhalidwe yomwe imafuna kuyika bwino.